diff --git a/core/modules/action/tests/src/Functional/ConfigurationTest.php b/core/modules/action/tests/src/Functional/ConfigurationTest.php
index 647e1a7..22e5991 100644
--- a/core/modules/action/tests/src/Functional/ConfigurationTest.php
+++ b/core/modules/action/tests/src/Functional/ConfigurationTest.php
@@ -83,7 +83,7 @@ function testActionConfiguration() {
     $this->assertNoText($new_action_label, "Make sure the action label does not appear on the overview page after we've deleted the action.");
 
     $action = Action::load($aid);
-    $this->assertNull($action, 'Make sure the action is gone after being deleted.');
+    $this->assertFalse($action, 'Make sure the action is gone after being deleted.');
   }
 
 }
diff --git a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
index d340d2e..8f24139 100644
--- a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
+++ b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
@@ -78,10 +78,19 @@ protected function assertText($text) {
    *   Plain text to look for.
    *
    * @deprecated Scheduled for removal in Drupal 9.0.0.
-   *   Use $this->assertSession()->responseNotContains() instead.
+   *   Use $this->assertSession()->pageTextNotContains() or
+   *   $this->assertSession()->responseNotContains() instead.
    */
   protected function assertNoText($text) {
-    $this->assertSession()->responseNotContains($text);
+    $content_type = $this->getSession()->getResponseHeader('Content-type');
+    // In case of a Non-HTML response (example: XML) check the original
+    // response.
+    if (strpos($content_type, 'html') === FALSE) {
+      $this->assertSession()->responseNotContains($text);
+    }
+    else {
+      $this->assertSession()->pageTextNotContains($text);
+    }
   }
 
   /**
@@ -192,4 +201,33 @@ protected function assertOption($id, $option) {
     return $this->assertSession()->optionExists($id, $option);
   }
 
+  /**
+   * Asserts that a select option does NOT exist in the current page.
+   *
+   * @param string $id
+   *   ID of select field to assert.
+   * @param string $option
+   *   Option to assert.
+   *
+   * @deprecated Scheduled for removal in Drupal 9.0.0.
+   *   Use $this->assertSession()->optionNotExists() instead.
+   */
+  protected function assertNoOption($id, $option) {
+    return $this->assertSession()->optionNotExists($id, $option);
+  }
+
+  /**
+   * Passes if the internal browser's URL matches the given path.
+   *
+   * @param \Drupal\Core\Url|string $path
+   *   The expected system path or URL.
+   *
+   * @deprecated Scheduled for removal in Drupal 9.0.0.
+   *   Use $this->assertSession()->addressEquals() instead.
+   */
+  protected function assertUrl($path) {
+    $path = "/$path";
+    $this->assertSession()->addressEquals($path);
+  }
+
 }
diff --git a/core/tests/Drupal/Tests/BrowserTestBase.php b/core/tests/Drupal/Tests/BrowserTestBase.php
index 8c72d80..867db61 100644
--- a/core/tests/Drupal/Tests/BrowserTestBase.php
+++ b/core/tests/Drupal/Tests/BrowserTestBase.php
@@ -1766,6 +1766,16 @@ protected function drupalGetHeader($name) {
   }
 
   /**
+   * Get the current URL from the browser.
+   *
+   * @return string
+   *   The current URL.
+   */
+  protected function getUrl() {
+    return $this->getSession()->getCurrentUrl();
+  }
+
+  /**
    * {@inheritdoc}
    */
   public static function assertEquals($expected, $actual, $message = '', $delta = 0.0, $maxDepth = 10, $canonicalize = FALSE, $ignoreCase = FALSE) {
diff --git a/core/tests/Drupal/Tests/WebAssert.php b/core/tests/Drupal/Tests/WebAssert.php
index 7b15d2d..da3a86d 100644
--- a/core/tests/Drupal/Tests/WebAssert.php
+++ b/core/tests/Drupal/Tests/WebAssert.php
@@ -103,6 +103,35 @@ public function optionExists($select, $option, TraversableElement $container = N
   }
 
   /**
+   * Checks that an option in a select field does NOT exist on the current page.
+   *
+   * @param string $select
+   *   One of id|name|label|value for the select field.
+   * @param string $option
+   *   The option value that shoulkd not exist.
+   * @param \Behat\Mink\Element\TraversableElement $container
+   *   (optional) The document to check against. Defaults to the current page.
+   *
+   * @throws \Behat\Mink\Exception\ElementNotFoundException
+   *   When the select element doesn't exist.
+   */
+  public function optionNotExists($select, $option, TraversableElement $container = NULL) {
+    $container = $container ?: $this->session->getPage();
+    $select_field = $container->find('named', array(
+      'select',
+      $this->session->getSelectorsHandler()->xpathLiteral($select),
+    ));
+
+    if ($select_field === NULL) {
+      throw new ElementNotFoundException($this->session, 'select', 'id|name|label|value', $select);
+    }
+
+    $option_field = $select_field->find('named', array('option', $option));
+
+    $this->assert($option_field === NULL, sprintf('An option "%s" exists in select "%s", but it should not.', $option, $select));
+  }
+
+  /**
    * Pass if the page title is the given string.
    *
    * @param string $expected_title